Crosshead and shoe



June 3, 1930. c. MARKEL'" cRossHEA'D AND SHOE Filed Dec. 30,4 1922A shown) to which is pivotal y or otherwise The 4cross-head walls=16 and 17 and thev connected a pitman orso-called connecting rod which transmits motion from the crosshead.

From an inspect-ion of Figure 2 it will be observed that the cross-head body is somewhat barrel shaped, and that the body, adja-` centfthe aperture 14,'is reinforced by a flange,

15,'integral side walls 16-16 and 1?-17 extending'from saidbarrel and forming therewith a generally tapering structure as seenV in Figure 1. The outer edges 16ZL and 17a of the walls 16 and 1'? are inclined toward the forward end of the crosssheadpthatis, that end to; which the piston-redis connected.

shoes carried thereby being identical in most .j respects ;v l `will therefore describe but one of the same; j i Ito-will befobservedr that the shoes, design'ated 18-18, are provided with channel portions'19, these channel portions being presented outwardly and receiving each one of the cross-head guides, not shown.

YAs previously pointed out, it is desired to adjustably yet firmly secure the shoe or slipper in its proper position on thecross-head,

' and to this endfthe shoe is provided, on its f inclinedsurfaces 26 and 27 walls 16 and 17, and

inner face, with a pair of integrally formed spaced longitudinal flanges 2O and 21, the outer or relatively remote surfaces 22 and 23 of said flanges being inclined, and adapted Y Ato 'engage complementally inclined inner vsurfaces'24 and 25, respectively, of the walls 16 and 17. `The shoe is provided with the which engage the complemental surfaces 16a and 17a of the thus, with the engagevment of the flanges and 21 with the adjacent surfaces of the walls 16 and 17, la dovetailedk connection is afforded vbetween the shoeand cross-head and generally inclined i cede that some means be prol vided for adjusting the shoe relative to the ACA ceL

cioss-headand to this end theshoe is pro` vided as best seen in Figures 1 and 3, with a transverse abutment 29, said abutment being arranged at the forward end of the crossf head, and formed integrally with said flanges 2O and 21.` outer and inner surfaces and 31 of the As will be seen inFigure 1 the abutment J are inclined with respect to the 'longitudinal axis to a degree which places them substantially'at ninety degrees to the plane of the inclined surfaces 16a, and said abutment has a central opening 32 having its L axis parallel with said surfaces.'

The barrel body 1() of the cross-head is provided with spaced radial lugs 33 arranged to lie between the flanges 20 and 21, said lugs being disposed soV as to receive between them a stud or bolt 34, the hexagonal head 35 thereof engaging behind said lugs in a suitable recess, and the threaded portion 36 extending through said opening- 32, to receive a retaining and adjusting nut 37. The lugs 33 are arranged in the same plane parallel to the surfaces 30 and 31, and the'recess behind said lugs prevents turning of the bolt 34.

It will be observed that the bolt 34, being parallel to the inclined surfaces of the shoe and cross-head, `insures a direct motion of displacement of the shoe on the cross-head, and-therefore, the bolt cannot bind. y1"he angular-ity of the abutment 29 and the lugs 33 is such that t-he strain imposed thereon distributed, which and upon the stud is furthermore aids in preventing undue lateral stress on the parts. j v

. In order to further insure the rigid securernent of the shoe on the cross-head, after an adjustment, the vided with a series of elongated slots 38, these slots being arranged complementally in pairs, one in each flange, and adapted to receive the Shanks of transverse bolts 359-39,

which bolts pass through aligned apertures in the walls 16 and 17. Nuts -40 secure said bolts against displacement. Expanding lockwashers 41-41 are provided on the bolts 34 and 39 for an obviouspurpose. j

When this invention is installedon a locomotive or any other reciprocating steam engine, the barrel 11 is keyed to the Vpiston rod and the pitinan or connecting rod (not shown) is pivotally connected at the rear end of the cross-head in said opening 14. The cross-head as shown is arranged for installation on a locomotive having two par* allel guides, that is, one guide above and one below the cross-head for'surface engagement with one each of said shoes 18. After the cross-head has beenv placed in position with the shoes attached thereto, the bolts39` may Y be loosened and the nuts 37 tightened so that the shoes are caused to slide rearwardly and move outwardly relative the crossshead into proper surfaceV engagement with the guide, whereupon the lock washers 41 are placed on the bolts The bolts 39 are then tightened by turning up the nuts 40 and the loclr washers for said nuts are applied. Y

lt will be observed that the shoes may be individually adjusted relativelyv tothe crossheads, and that these shoes may bevreadily removed as required regardless of the position of the pitman. Thisis rendered possible by virtue vof the fact thatthe shoes may be removed only in the direction toward the piston rod (not shown), vin operative position.

when the device is v Thus, if one of the shoes is fractured orv otherwisedamaged or flanges 20 and 21V are pro!- Worn out in service the lshoe may be .readily replacedwithout the necessity of disconfnect-y ing the cross-head `froinithe"pistonrody orf fionithe pitxnan `or connecting rod.` The `sleleton colnstruction ofthe cross-head and shoes tends to li o'hten the device Without sacrificing vstrengthY and rigidity.VV Furtherj l signedrny nam more, any tendency oftheshoes and crosshcad to vibrate or move relatively inservice is effectually prevented by the provision of the dove-tailed connection and its" coopera` tion with the bolts 34 and 39.'` Y' Y Having thus described myV invention and,

partl'of said slipper, and along the central longitudinal axis thereoflparallel tov' the ta-` engaging `said lugs, wherebyv upon tightenf ingv said nut said slipperis drawn along the cross-head,` and self-centered thereon. r .Y

In testimony -Whereof I have hereunto e."l 1 CHARLES vMaintien illustrated its use, WhatI claim as new and A desire to secure by Letters Patentis :e

l. In a device of the character described, in

combination, a cross-head having inclined vsurfaces,'Wearing plates provided Withinclined surfaces engaging the inclin'edsurqY faces of the cross-head@ and extending beyond the ends of said crosshead, said Across-headl l Vbeing provided with lugs, complemental lugs v f clined surfaces `engaging the inclined surv faces of the cross-head and extending be` yond the ends of said cross-head, said'cross l head being providedwithrlugs, complemen-P tal lugs on said Wea-ringplates, and means parallel with said inclined surfaces passing.r through the lugs adapted to exert a self-centering force onsaidVcross-head and plates for Y adjusting and securing said plates.

' tapered to compensate. for Wear ofthe slip- 3.V The combination With a cross-head hav1 ing nieans for connecting a piston rodzto'one. end thereof, of aslipper on said cross-head, said slipper and cross-head beingfreversely per,y one end of said cross-head carryingsa'id f y piston rod connection, and means arranged c in a plane parallel to the taper of s'aidcrossv Clt Y lwallsof said slipper and cross-head being head adjacent the said piston rod for exertr ing pulling force on the slipper vlongitudi-l` `i .nally of the cross-head and for securing said g slipper to said cross-head.V y t.

Ll. The combination with a cross-head havf- A ing means for connecting la piston rod'toone' end thereof, of aA slipper on said cross-head,

said cross-head having spaced Walls provided Vwith inner inclined dove-tail surfaces, said slipper having spaced longitudinall flanges complemental to said spaced Walls andreceivable between the same, and having outer inclined dovetail surfaces, the flange'sand reversely tapered to compensate forvvear of 'y the slipper, spaced lugs on thej'cross-head extendii'ig into the space betweensaid flanges,

a bolt having anut andextending through a.

pered line of the/slipper, and cross-head and iis; 

